Geophysical and Geological Characterization of Core Materials in Support of the kISMET Experiment at the Sanford Underground Research Facility (SURF)

The kISMET experiment included drilling monitoring holes (50 m deep) and an injection hole (100 m deep) at the 4850 Level of the Sanford Underground Research Facility in Lead, SD, USA. The core from two of the HQ-size monitoring holes was examined to determine petrologic, acoustic velocity, and magnetic susceptibility properties. The core was characterized as being a graphite carbonate phyllite with the carbonates being both calcite and dolomite. Regular variations with depth in the acoustic velocities were recognized and will provide information to inform the analysis of the hydraulic fracturing results.